Samuel p



(No Model.)

s. P. ROBINSON.

MOLDERS FLASK.

' Patented Mar. 4, 1884.

WITNESSES INVENTOR 1 My immediate object is to construct, with- Erica.

PATENT SAMUEL P. ROBINSON, OF PLAINFIELD, CONNECTICUT.

Mo LDERS FLASK- SPECIFICATION forming part of Letters a Patent No.294,406, dated March 4, 1884.

Application filed January 9,1884. (No model.)

T0 aZZ whom it 71mg concern.-

Be it known that I, SAMUEL P. ROBINSON, of Plainfield, Windham county,Connecticut, have invented certain new and useful Improvements inMolders Flasks, which improvements are fully set forth and described inthe following specification, reference being had to the accompanyingdrawings, in which Figure 1 is aperspective view of a two-part flaskembodying my improvements. Fig. 2 is a detached view of my improved formof parting-strip, and Fig. 3 a sectional View on line on x of Fig. 1.

out the use of nails, a flask which shall be lighter, yet stronger, thanflasks as commonly constructed, and which may be quickly taken. apart orassembled whenever necessary. This I accomplish by the use of a seriesof metallic corner-pieces of peculiar shape, as fully describedhereinafter.

In Fig. 1, A represents the upper flask or cope, composed of the foursides a a a a". These pieces may be mitered at the corners, or may beallowed to abut, as at b.

B represents right-angular corner-pieces, made, preferably, of thin castmetal, having strengthening ribs c c, which on one side of the angle areperforated, as at d, to receive the guide-pins (3. It is my purpose touse four guide-pins, one for each corner, although two or three could beused with asatisfactory result. On theinner side of the flask, directlyopposite to the corner-pieces B, are sheetmetal plates E. I

As a convenient and cheap means for secur-f ing the several parts of the*flaslctogether, I drill through the corner-piecesl3, the wooden sidesof the flask, and the plates E, and, after having inserted bolts 6 fromthe inner side of the flask, I fasten the whole firmly together by nutsh, screwed onto the outer end of said bolts,the plates E forming,practically, washers under the heads of the bolts. Thus it will be seenthat my flask is fastened rigidly together without the use of nails, andas my metallic corner-pieces are thoroughly stiffened by the ribs 0, itis impossible for the flask to warp or leave its original square oroblong shape, and as the sides may be made of a comparatively thinmaterial, the flask is much restrips and projecting outward a distancesomewhatless than the thicknessof the wooden On the inner sides of thesides of the flask. flask I provide holes is, corresponding in numher,size, and position with the pins 13. When it becomes necessary to usecross-bar F, one of the sides a is removedby unscrewing the nuts whichsecure said side. The cross-bar .is placed in position, as in Fig. l,the pins@' entering holes 70, when the side may be again returned to itsplace and secured by the bolts and nuts, as before described.

WVhen using a two-part flask, (cope and nowel,) the guide-pins should belong enough to pass downward into the perforated cornerpieces of thelower half, as shown at C, Fig. 1, and when a series of cases are usedto build up a deep flask, the guide-pins should be long enough to extendthrough and support the en tire series.

' The guide pins 0 are held in place by wedges of wood, n, or othersuitable material, which are entered between the body of the pin and theplate which forms a part of the angular corner-piece.

I prefer to use wedges of wood, as they are inclined to swell whendampened by themolding-sand, and remain firmly fixed in place untildrivenout, and'if lost orbroken they are quickly and cheaply replaced.

Having thus described my invention, I claim as new and wish to secure byLetters Patent 1. In combination with the sides orwalls of a flask formolders use, a series of right-angular metallic corner-pieces, and acorresponding series of washer-plates, E, on the inner side of theflask, the plates E, the sides of the flask, and the metalliccorner-pieces being clamped firmly together by bolts and nuts, asdescribed, said corner-pieces being provided with strengthening ribs 0,for the purpose of retaining the flask in its rectangular form, asdescribed.

2. In combination with the walls of a flask for mol'ders use, a seriesof right-angular metallie corner-pieces having strengthening 'ibs bodyof the guide-wire and the plate of the IO a, perforated, as at d, toreceive guide-wires, corner-piece, saidvangular eorner-pieees being;whereby the upper and lower flasks, or a seclamped to the walls of theflask by bolts and ries of flasks, may be held in vertical align- Inuts, as and for the purpose specified. ment as and for the m1 )ose seoified. i T

3. In combination witl l the galls of a flask, SAMUEL ROBINSOB' theangular corner-pieces B, with perforated Vitnesses: strengthening 'ibs,and the guidewire 0, held FRANK H. ALLEN, firmly in place by wedgesentered between the I FRANK L. LATIIROP.

